258 



Mr. G. J. Arrow on LameUicorn Beetles 



fVMCi^<^ 



by Bates. I have seen similar individuals of various other 

 species. 



The Geotrupes dentatus simultaneously described in 1801 

 by Fabricius and Weber has since remained unrecognized, 

 although placed by Burmeister (and by the Munich Catalogue, 

 ill consequence) in the genus Oryctes on account of its com- 

 ])arison by Weber to 0. nasicornis. If the two original 

 descriptions are compared with a female specimen of Xylo- 

 trupes gideon^ L., I do not think it will be doubted that that 

 is the insect referred to. 



Oi'i/ctes faimus, Billb., although supposed to inhabit 

 " Barbary," is evidently a female KStrategus, probably 

 S. valid us, F. 



In his * Catalogue of the LameUicorn Coleopteraof Argen- 

 tina' (part iv., 1911) Mr. Carlos Bruch has included the 

 name of Thronistes rouxi, Burm., a very rare and peculiar 

 insect found in Chili (according to Reiche); but from a 

 specimen he has kindly sent to me I have been able to 

 ascertain tiiat tiie Argentine beetle is not Thronistes, but a 

 small female Golqfa, apparently that of G. cochlearis, Oliaus. 

 In describing the front tibiae of this species Dr. Ohaus seems 

 to have reversed the sexes, for a male co-type presented to 

 the British Museum by Mr. Bruch has only three distinct 

 teeth. 



The name Ceratocrates, introduced by Dr. Ohaus for a 

 new genus, is preoccupied. I have therefore substituted 

 Gnathogolofa (nom, nov.). 



P aimer stonia minor, Blackb., is the female of Horonotus 

 optatus, Sharp [Dipelicus). P. hovilli, Blackb., is also a 

 female of a species related to D. montrouzieri, Reiche, and 

 nasuius, Bates. 



Pseudopimelopus I'lndi, Blackb., appears to me to be 

 P. nothus, Burm. 



Pliileurus senegaleyisis, Cast, {cariosus, Burm.), is a species 

 of P seudosyrichthus closely related to P. clathratus, Gerst. 



Trionychus strigipennis, Fairm., appears to have been 

 described from a small s\)ecimen ot Hovopliileurus sulcipennis, 

 Arrow, which specific name is therefore superseded. 



Heteronyclius mgirifvions, Fairm., is evidently //. araior, F. 



Semanopterus dentatux, Blackb., the type of which is now 

 in tlie British Museum, is a species of J£ophileurus. 



The members of the latter genus, although remarkably 

 alike in external appearance, are rather numerous. The 

 examination of the nedeagi of the males reveals a striking 

 diversity of forms, and renders inevitable the separation of 

 what, apart from this criterion, I should consider to have at 



